Mark the intrinsic factor that influences the development of a plant.

Options

A. PGRS
B. Genetic complement
C. Nutrition
D. Both (1) & (2)

Answer

To answer the question regarding the intrinsic factors that influence the development of a plant, we can break down the information provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Identify Intrinsic Factors**: Intrinsic factors are internal factors that influence the growth and development of a plant. These include genetic makeup and plant hormones.

2. **Plant Growth Regulators (PGRs)**:
- PGRs are also known as plant hormones, which include auxin, cytokinin, ethylene, and gibberellin.
- These hormones play a crucial role in regulating various growth processes in plants, such as cell division, elongation, and differentiation.

3. **Genetic Complement**:
- The genetic makeup of a plant determines its characteristics, including height (dwarf or tall), color, and resistance to diseases.
- Genes control the expression of traits and are essential for the overall development of the plant.

4. **Nutrition**:
- While nutrition is vital for plant growth, it is considered an external factor, not an intrinsic factor.
- Therefore, it does not influence the development of a plant in the same way that PGRs and genetic factors do.

5. **Conclusion**: Based on the analysis, the intrinsic factors that influence the development of a plant are:
- Plant Growth Regulators (PGRs)
- Genetic Complement

Thus, the correct answer to the question is both 1 and 2, which corresponds to the fourth option.